TÜV Rheinland Updates V2G Certification Path for DC Fast Chargers

On May 10, 2026, TÜV Rheinland issued an update to its Vehicle-to-Grid (V2G) certification requirements, mandating new dynamic bidirectional power response testing for all DC fast charging stations—including those manufactured in China—seeking V2G certification. This change directly affects EV charging infrastructure exporters, certification-holding manufacturers, and system integrators serving European and interoperability-sensitive markets.

Event Overview

On May 10, 2026, TÜV Rheinland published V2G Certification Update Notice #2026-05. Effective June 1, 2026, all DC fast charging stations applying for V2G functionality certification must pass the ‘100-ms-level bidirectional power step response’ test specified in IEC 61850-7-420 Annex B. Manufacturers holding only UL 2594 V2G compatibility certification—including Chinese producers—must complete this supplementary test by May 31, 2026; failure to do so will result in suspension of their existing V2G-related certification status.

Industries Affected by Segment

DC Fast Charger Exporters (China-based)

These companies are directly impacted because their products—already certified under UL 2594 for V2G compatibility—no longer meet TÜV Rheinland’s updated functional verification criteria. The requirement introduces a new technical validation layer focused on real-time grid interaction capability, not just communication protocol conformance.

OEMs and System Integrators Deploying V2G-Enabled Infrastructure

Integrators specifying or procuring chargers for EU-based V2G pilot projects or commercial deployments must now verify that units carry the updated TÜV Rheinland certification. Units certified only to UL 2594 prior to June 1, 2026, may face rejection during conformity assessment or grid interconnection review in jurisdictions referencing TÜV Rheinland’s certification as a de facto benchmark.

Third-Party Testing and Certification Service Providers

Laboratories supporting Chinese charger manufacturers must now offer—and be accredited for—the IEC 61850-7-420 Annex B dynamic response test. Capacity constraints or accreditation timelines could delay submission windows for clients needing certification renewal before the May 31 deadline.

Key Considerations and Immediate Actions for Stakeholders

Monitor official updates from TÜV Rheinland and national grid operators

The notice references Annex B of IEC 61850-7-420 but does not specify test setup details (e.g., load profile definitions, pass/fail thresholds beyond timing). Stakeholders should track any subsequent technical bulletins or FAQs released by TÜV Rheinland before initiating test planning.

Prioritize units with active EU market entry plans

Manufacturers should identify which product SKUs are scheduled for CE marking, German VDE approval, or participation in national V2G tenders (e.g., Germany’s KfW-funded smart charging programs). These units require urgent re-evaluation against the new requirement—not all UL 2594-certified models need immediate retesting if they are not targeted for EU V2G deployment.

Distinguish between certification signals and operational readiness

This update reflects a tightening of functional verification—not a revision of safety or EMC standards. It does not imply broader regulatory changes to EN 62196 or EN 61851 series, nor does it affect non-V2G DC charger certifications. Companies should avoid conflating this specific functional test mandate with general compliance overhauls.

Initiate coordination with accredited labs now

Given the May 31 deadline for supplementary testing, manufacturers should confirm lab availability, required documentation (e.g., firmware version logs, control algorithm descriptions), and lead times for test execution and report issuance—especially for units requiring firmware updates to meet the 100-ms response criterion.

Editorial Perspective / Industry Observation

Observably, this update signals a shift from protocol-level interoperability assurance toward performance-based validation of V2G functionality. It reflects growing grid operator expectations for predictable, low-latency power modulation—particularly relevant as EU member states advance distributed energy resource (DER) integration frameworks. Analysis shows this is not yet a harmonized regulatory requirement (e.g., no corresponding amendment to EU Delegated Regulation (EU) 2019/631), but rather a certification body’s proactive alignment with emerging grid code trends. From an industry perspective, it functions less as an immediate compliance barrier and more as an early indicator of the technical rigor likely to be embedded in future national V2G grid codes and procurement specifications.

Consequently, stakeholders should treat this as a forward-looking signal—not a finalized regulatory endpoint. Its significance lies in accelerating technical due diligence for V2G-capable hardware, particularly where responsiveness, control loop stability, and firmware behavior under transient conditions were previously assumed rather than verified.

Conclusion: This certification update marks a procedural refinement rather than a systemic overhaul. It underscores that V2G deployment readiness increasingly hinges on measurable dynamic performance—not just static interface compliance. For affected enterprises, the current priority is targeted verification, not wholesale redesign; the more appropriate interpretation is that functional maturity, not just protocol support, is becoming a prerequisite for market access in advanced V2G ecosystems.

Source: TÜV Rheinland, V2G Certification Update Notice #2026-05, issued May 10, 2026. Note: Test implementation details (e.g., exact waveform definitions, environmental conditions) remain pending official clarification from TÜV Rheinland and are subject to ongoing observation.